Self-cleaning, rotary heat exchanger

Details Self-cleaning, rotary heat exchanger Self-cleaning, rotary heat exchanger

1986-03-04

1987-02-03

Davis, Jr., Albert W.

Heat exchange

Movable heating or cooling surface

165119, 165133, 165111, 165921, 165 95, 34 86, F28D 500

Patent

active

046403442

ABSTRACT:
A rotary, Perkins tube heat exchanger for processing hot contaminated gas flows emanating from appliances such as laundry driers, grain driers and the like. The case of the heat exchanger is located relative to the rotor so as to lie in the gas flow boundary layer established by the latter. The case is provided with a boundary layer purge port in the hot gas chamber. An airfoil extends inwardly from the case into the gas flow boundary layer. It causes increased local turbulance in the boundary layer gas. It also diverts a predetermined proportion of the boundary layer gas and its burden of contamination products out through the purge port. The boundary layer airflow cleans both the interior of the case and the rotor, even through the rotor is characterized by the presence of a multiplicity of small openings. The device thus is rendered self-cleaning and may be operated for extended periods of time without buildup of contaminants within the heat exchanger case.

REFERENCES:
patent: 1901370 (1933-03-01), Kuhner
patent: 2037490 (1936-04-01), Vorkauf
patent: 3621908 (1971-11-01), Pravda
patent: 3740966 (1973-06-01), Pravda
patent: 4000778 (1977-01-01), Laing
patent: 4405013 (1983-09-01), Okamoto

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